M10 x 1mm male to 1/8 Npt female brass oil pressure adaptor.
    
Oil pressure sensor adaptor for easy fitment of 1/8 Npt aftermarket oil pressure Sensors into many of the Volkswagen, Audi, Seat, Skoda cars using the existing M10 hole on the filter housing.
    
As with any hydraulic installation thread sealant should be used.